CN1070376A

CN1070376A - Be used in the packaging film sealing tech on the baling line

Info

Publication number: CN1070376A
Application number: CN92110467A
Authority: CN
Inventors: H·F·隆格
Original assignee: Kraft General Foods Inc
Current assignee: Mondelez International Inc
Priority date: 1991-08-08
Filing date: 1992-08-07
Publication date: 1993-03-31
Anticipated expiration: 2007-08-07
Also published as: TW203586B; JPH05262335A; HK96697A; AU649854B2; KR930004155A; ATE145182T1; ES2096682T3; SG45421A1; PH31020A; CA2073821A1; CA2073821C; DE69215172D1; EP0531701A1; GR3021848T3; CN1034920C; NZ243775A; EP0531701B1; MY108286A; DE69215172T2; US5247781A

Abstract

A kind of and horizontal form, filling and leak free device serial connection, a pair of continuous narrow intermeshing Reclosable clamping material band is pressed onto a method and apparatus of rolling up on the membrane material, this dress is in order to provide Reclosable packing.Described clamping material is fixed in vertical bending part in the packaging film material coiled strip, and described coiled strip is directly sent into moulding, in filling and the closing appliance, and coiled strip horizontal orientation wherein, product is put thereon.Two side direction around product are rolled coiled strip, and its both sides are converged, and constitute a vertical wing sealing, and then the end of packing is sealed to closing appliance by mould, cuts pack end from coiled strip then, and finished product packing is separated with previous with follow-up packing.

Description

Be used in the packaging film sealing tech on the baling line

The present invention relates generally to packing, particularly shaping, filling and the sealing of Reclosable packing.

For certain food, obtain actv. packing and acceptable shelf life, can carry out hermetically sealed packaging to food by moulding/filling/sealing (FFS) operation and realize.A kind of in the FFS of the commercial prior art that product cheese piece is packed that has adopted operation, comprise a stacking polymer material coiled strip is carried out horizontal location, the said goods is placed on the packing coiled strip, this coiled strip is scrolled up in the product both sides, make the both sides joining, so that form vertical wing sealing, closed end downcuts finished product packing from coiled strip then.The gas bleed The Application of Technology makes eliminates oxygen from the inside of packing.Operation as above is disclosed among the US3274746.

According to above-mentioned method, for the closure again of the packing of product is provided, can carry out coiled strip before the FFS operation, the continuous arrowband of the zipper material operating mode with volume to volume is fixed in the longitudinal folding part continuous in the coiled strip.A kind of employing has a kind of moulding/filling/seal operation that is fixed on a volume film of the longitudinal folding pre-storing slide fastener in the coiled strip and had set forth in U.S. Pat 4589145 and 4663915.A shortcoming of this method is to need two its efficient of lock out operation lower for finished product packing.In addition, after adhering to slide fastener, these packing volume becomes quite heavy and difficult and operates, and owing on a side of coiled strip, overstock the pantostrat of zipper material, so it is a bevelled.May limit the speed of FFS device like this, and need change more package raw material than the FFS operation of not adopting slide fastener.Therefore, it is necessary providing a kind of Reclosable packing method of more effective horizontal FFS operation.

The present invention relates to a kind of be suitable for horizontal FFS device, with a pair of narrow can intermeshing band be attached on the packing coiled strip, produce the method and apparatus of Reclosable packing, described band is to be made by the clamping material of Reclosable.Described clamping material is fixed in vertical bending part in the packing volumes, and its coiled strip is directly sent into FFS machinery then, coiled strip horizontal arrangement wherein, and product places on the coiled strip.Then its coiled strip is upwards rolled round the both sides of product, and two edges are converged and formed a vertical wing and seal, and by transverse sealing device pack end are sealed then, downcut pack end from coiled strip, finished product packing from the front continuous packing separate.

About being to make the device compactness being attached to the design of volume on the membrane material on the flow production line with the clamping material.The device that is used to adhere to the clamping material is suitable for according to existing moulding, filling, water-tight equipment reforming equipment most, and does not have the required space of special increase clustered aggregates.For this purpose, the device that adheres to the clamping material adopts two layer operations; Wherein the mechanism that clamping components is attached on the film is configured in lower floor, and vertical bending of coiled strip is finished on the upper strata, and the supporting package packaging film surface of this upper strata and existing installation is on sustained height.

Another problem that method and apparatus of the present invention solves is control and the fold of eliminating coiled strip.Fold can influence closed process and destroy air-tightness.Method and apparatus of the present invention makes packaging film keep level and smooth no wrinkle substantially.

To be further described the present invention below.

Fig. 1 is a transparent view of the present invention.

Fig. 2 carries out a bag shaping, filling and osed top transparent view by device shown in Figure 1.

Fig. 3 is the cross sectional drawing of Fig. 2 line 3-3.

Fig. 4 is that diagram is carried out a bag shaping, filling and osed top scheme drawing by device shown in Figure 1.

Fig. 5 is the lateral plan of device, has represented that the continuous band that will seal the clamping material again delivers on the coiled strip of packing, and the vertical dogleg section in the product device of Fig. 1 device is provided.

Fig. 6 is the planar view of Fig. 5 device.

Fig. 7 is the lateral plan of the packaged unit of Fig. 5 device.

Fig. 8 is the cross sectional drawing along Fig. 7 line 8-8.

Fig. 9 is the cross sectional drawing along Fig. 7 line 9-9.

Figure 10 is the cross sectional drawing along Fig. 7 line 10-10.

Figure 11 is the cross sectional drawing along Fig. 7 line 12-12.

Figure 13 is the cross sectional drawing along Fig. 5 line 13-13.

Figure 14 is the cross sectional drawing along Fig. 5 line 14-14.

The present invention preferably is implemented on the manufacturing method and apparatus of shaping, filling and sealing Reclosable packing.

Preferred device 10 generally comprises a device 12 and one abutment means 14, described device 12(is used for) will a pair ofly be used for heavily sealing

continuous arrowband

16 and 18 that the clamping material makes and be connected to a coiled strip 20 that packs material, and in its film, process a longitudinal folding part 22 to accept the described clamping band that adheres to, described abutment means 14 with film, also sealing, cutting film, is made end product packing or bag 26 in order to packing around product 24.

Described bag material preferably includes the laminated thin polymer film, is attached with ethylene vinyl acetate copolymer on the surface within it.The described application that is coated with is suitable for the packing heat sealing, is particularly suitable for by in the closed region space or imperfect place being filled up to realize good leak tightness in the heat seal process.Described packing are realized feeding by the form with package that is bearing on the rotating drum, and described rotating drum has a horizontal axis, and it is vertical with the coiled strip feedstock direction that passes described device.Described coiled strip 20 has and a series ofly is printed with label in advance and the buyer is known need open and the blank of the description of operation of the step of closing bag again, and this label and description of operation repeatedly are printed on the stock in advance with the well-regulated interval corresponding to above-mentioned charge length.In one embodiment, the length of this stock is about 12 inches.

Have continuous slide fastener formula structure on

clamping band

16 and 18, each band is holistic, the integrated part of extruding, Yi Bian it is level and smooth surface 28 basically, on packing, one side and opposite be zipper-type structure 30.Can device that be convenient to this clamping band of the manual frictional engagement of customer be set on the zipper-type structure next door, this device also can be convenient to separate zipper-type structure 30 when opening finished bag.So device can adopt the version of vertical beading or groove.

Describedly be with 16 and 18 preferably to make by pliable and tough, elastic polymeric material, as, polyethylene.For ease of making the sealing of described band and above-mentioned packing, and, can apply with ethylene vinyl acetate at zipper strip or its part in zipper strip end and finished product packing interfaces leak free intersection point place maintenance leak tightness.In another embodiment of the present invention, each band can have hotmelt and be coated with on the surface 28 that imposes on the zipper-type structure opposing face.Or the clamping band of picking out can not add overlay, only provides adhesive bonding property by the ethylene vinyl acetate that covers on the packing.

Before use, its

clamping band

16 and 18 is the form storage to reel preferably, and its corresponding pull-type chain structure 30 end therein engages one another.The reel 36 of the slide fastener raw material that supporting is reeled, its fuse diameter preferably is at least 12 inches.This diameter is bigger than the slide fastener stock reel of known commercial use, and described raw material used in this device development.After the slide fastener raw material is connected with the film coiled strip and is longitudinally folded, keeping thinking that having bigger fuse diameter provides comparatively significantly advantage aspect this raw material linear.

In development process of the present invention, problem has appearred in the fold of packing film in the different phase of its device operation.Because this film turns round in three dimensional space, promptly need to make the longitudinal bending part, around product, pack and seal its product with film, described fold problem is a suitable complicated problems.Some aspect of having found the fold problem is because clamping

band

16 and 18, it is caused to get the trend that is non-linear configurations after attaching is on packaging film volume 20, and it is found that this clamping band 16 is relevant with 18 non-linear fuse diameter with the employed carrying material volume that is in operation.Found that big relatively fuse diameter structure can reduce some aspect of fold problem.Other aspects of fold problem will be in following discussion.

The cylinder of slide fastener raw material 36 has a horizontal axis, and it is positioned at the side in order to the device 12 of attaching clamping material in the embodiment shown, and is bearing on the separate support frame 38.Described slide fastener raw material enters a dancing pulley device 40 from cylinder, this device comprises a pair of free rotation roller, between it, define the passage of a gap as the slide fastener raw material, this roller just is subjected to pivot L type lever arm 42 overhang brackets so that can rotate at this place, described lever arm 42 is pivotally supported on the idler frame 38 and biased downward, so that its slide fastener raw material is being moved to from cylinder 36 when it being attached to the device 12 on the described packing coiled strip 20, eliminate the relaxed state of this slide fastener raw material, and keep basic tension force uniformly.

Then, its slide fastener raw material is sent into a separating device 43, and this device comprises a pair of track adjusting

wheel

44 and 46, and continue to deliver on the track adjusting wheel 48, contact with separating wheel 49 then, it is disconnected from each other with zipper-type structure 30 continuously that it separates wheel 49, and be separated into corresponding zipper strip 16 and 18.These zipper strips are around their longitudinal axis half-twist, be in to have the state gap, parallel mutually, and their bottom surface 28 are coplanar basically.Under this state, these zipper strip pulls to roller 50, and are passed a fluting guide 52, it makes this band just in time face toward package film 20.

Direct downstream at guide 52, the longitudinal region and the zipper strip that are adjacent to package film 20 heat by a pair of copper beryllium hot plywood 54 together, not with situation that hot plywood 54 contacts under, the heat conduction form by radiation and convection current heats up above-mentioned band and film zone.Then, by a series of

pressure roll

58,60,62 and 64 apply pressure to the projection 56 of band and package film in abutting connection with heating region, will be with 16 and 18 fusings or be adhered on the above-mentioned film.In order this film and clamping carrying material to be provided required heat and can to keep relative high operating speed, this hot plywood should be longer relatively, and its length is preferably 12 inches, and as much as possible near film and clamping band, preferably is separated by less than 0.1 inch.

As shown in Figure 7, the preferred pressure wheel comprises wheel apparatus and following wheel apparatus, and described upward wheel apparatus comprises the wheel 58 and 60 of the forward and backward configuration of a pair of one-tenth, and following wheel apparatus then comprises the upward wheel 62 and 64 of wheel institute applied pressure of resistance.Desirable is to go up wheel 58 and 60 to apply approximately equalised pressure, for this purpose, they are contained on the supporting member 66, and this supporting member is a pivot with the pin 68 that is configured in some positions, make vertical with coiled material and the plane of passing pin between two-wheeled and with two-wheel apart from approximately equal.This pin 68 is fixed to an end of pivot lever arm 70, and the lower end of a recess 72 supporting coil springs 74 is arranged in described lever arm 70, and this spring is placed with lever arm 70 biased downward with compressive state, promotes downwards thereby will go up wheel 58 and 60.In order to adjust its bias force, the following end in contact of the upper end of coil spring 74 and adjustable screw device 76, this device 76 is bearing in the tapped bore in the frame element 78, and its lower whorl 62 and 64 rotatably is contained in the fixedly T shape supporting 80, and this supporting 80 is made of extension on the undercarriage element.

The bearing that is fit to is loaded on each corresponding upper and lower wheel, and its bearing 82 that is loaded on one of lower whorl is shown in Figure 12.As Figure 12, wheel and lower whorl have the

surface

84 and 85 of relatively large diameter on each, its either side contacts with the corresponding adjacent surface of package film with the convex surface 56 of clamping carrying material, and the face the 86, the 87th than minor diameter between it contacts with coiled strip in order to avoid the clamping band between convex surface 56.The described lower whorl that contacts with clamping band projection is annular knurls than major diameter face 85, is quite smooth and go up corresponding 84 of wheel.

After between by upward pressure wheel and

downforce

58,60,62 and 64, to have the film that adheres to zipper strip and pass through upwards pull of track adjusting wheel 88, track adjusting wheel 88 is configured in apart from the pressure wheel downstream a bit of distance, then the roller 90 by being positioned at described device input end.Described film is after 90s by roller, has changed direction, promptly from becoming 30 ° angle (see figure 5) and upwards be sent to horizontal direction left with vertical direction, and from the input end of its device 12 to mouth.

Described film 20 is bearing in by roller transmissioning device 92 near the input end of device 12, and its conveyer 92 has a series of scroll wheels 94 that rotate around horizontal axis, and with the lower surface rolling touch of film 20.At the downstream part that is right after of roller transmissioning device, have a level and smooth substantially surface 96, this film slips over this surface with supporting product 24 thereon.

This product 24 installs on the film 20 of described device input end by a horizontal belt conveyer 98, its device 98 extends to the input end of device 12, so that according on the coiled strip 20 and the regular intervals conveying products 24 of blank longitudinal size, its driving time is relevant with the driving time of coiled strip 20, is connected with corresponding driving mechanism with timing chain or belt 99 and realizes.

One longitudinal slot or groove 100 are arranged near roller transmissioning device 92 and the areal of support 96, are used to accept the winding apparatus film dogleg section 108 that comprises clamping band 16 and 18.Package film longitudinal component 102 between the configuration clamping carrying

material

16 and 18 is subjected to a vertical orientation and takes turns 104 downward application forces, above-mentioned take turns 104 with the film rolling touch.Its

clamping band

16 and 18 same pulled down entering in the groove.When coiled strip continuously when device 12 is carried, its dogleg section 108 is taken turns 106 and one static diaphragm plate 110 by second and is kept, this diaphragm plate 110 and film and the moving contact of clamping band.This plate 110 has a groove 112 in each side, limits zipper-type structure 30 in the mode of moving contact, and keeps

clamping band

16 and 18 aligned with each other, and its intermeshing zipper-type structure 30 is suitably cooperated.When dogleg section 108 when plate 110 passes, its outside face contacts with the inside face 116 of guide plate 114.The end of slave plate 110 directly down, the inside face 116 of its guide plate diminishes gradually, so that when coiled strip spurs forward, pressure inwardly is applied on the outside face of coiled strip dogleg section, thereby produces intermeshing of zipper-type structure 30, i.e. slide fastener closure.

Then its coiled strip from the device 12 of bonding zipper-type structure and bending coiled strip wear to the device 14 on this device 14 be in order to implement needed moulding, filling and osed top bag 26 further steps.

Described zipper-type structure still keeps intermeshing, and the relative longitudinal edge 118 and 120 of coiled strip upwards wrapped described product, generally converges at the middle part of the upper surface of product, and is enclosed in together and forms a vertical wing on the upper surface of moulding bag and seal 122.124 processing of habitual closing appliance are adopted in its wing sealing 122.

Press known technology, device 126(Fig. 1) be used to bleed or the back scrubbing packing.Transverse sealing is finished by closing panel 128, downcuts finished product packing from coiled strip and sees Fig. 4 by a transverse cuts tool 130() finish.

As mentioned above, using one of problem that this device will solve is the fold of control coiled strip, particularly forms vertical bending and zipper-type structure produces in the intermeshing zone being adjacent to.In these zones, wish that film keeps smooth substantially in each side, no wrinkle.

For this purpose, the control of fold realizes by adopting assembling device, comprises the conical surface that adopts roller 90; Provide and make the device that rolls 90 slight inclination; And the friction wheel 132,134,136 and 138 that adopts upper surface a series of and coiled strip 20 to contact.

The surface of this roller 90 comprises a pair of

frustoconical surface

140 and 142, and their positions of 102, zone that is equivalent between

clamping material band

16,18 are converged, and makes the diameter maximum of in this position its roller 90, and cone angle is quite little, as 5 °.

In order to adjust roller 90, the end at roller is adjustable to the freedom of motion of one dimension at least at least, to regulate the position of roller.In the embodiment shown.As shown in Figure 1, the right hand end of roller is supporting a pivot arm 144, and determined height is lower than the height of roller left hand end slightly.Played the effect that partly compensates the coiled strip tension variation like this, its stressed variation is owing to

additional clamping band

16 and 18, vertically the moulding of dogleg section 108 and the coiled strip packaging product 24 that makes progress makes asymmetric the causing of coiled strip generation.

Further control fold and coiled strip tension force are realized by friction wheel 132,134,136 and 138, and each friction wheel of setting is for when the coiled strip ahead running, and outside tension force is provided near one of coiled strip edge 118 and 120.Friction wheel contacts with the upper surface of coiled strip 20, is rotated by travelling forward of coiled strip, and it is taken turns slightly outwardly, so that their rotation impels and takes turns the coiled strip surface that contacts outwardly.

For fear of when the shut-down operation, the damage of coiled strip 20 and

clamping band

16,18 is provided with a device, so that when coiled strip is out of service, extracts hot plywoods 54 out near the coiled strip 20.Shown in Fig. 7 and 9, this hot plywood 54 is parts of device 146.Device 146 support bodys 148 that comprise on the support body that is fixed to device 12; back and forth supporting member 152,153 moves between make position and open position in order to the supporting hot plywood; in make position; it is very near that the hot surface 154 and the coiled strip of this hot plywood leans on each other; and at open position; enough spaces between hot plywood and the coiled strip 20 are provided, and avoiding when shutting down, coiled strip is overheated.Shown in Fig. 7 and 9, this hot plywood then is in the close position.

Device 12 comprises a control system 155, when starting, before coiled strip brings into operation, is shown in an open position these system's 155 preheating heat plywood 54 with its hot plywood 54.This just can make

clamping material band

16 and 18 substantially on the coiled strip total length direction between the hot plywood 54 and the real tight connection of coiled strip, rather than when the operation beginning, because hot plywood is in its service temperature heat process, because of the phenomenon that clamping

band

16,18 is difficult for being attached on sizable length appears in temperature inadequately.

As shown in Figure 9, each reciprocal supporting member 152 and 153 comprises the bar 158,160 of pair of parallel, and they are configured in the hole in the fixed mount 148 at each end place of each hot plywood slidably, and is connected with mounting blocks 161 on installing to hot plywood 54.

Hot plywood 54 closed and open between moving through to adopt and surge or air cylinder 168 and realize that described cylinder is positioned at the middle part of slender type device substantially.Link to an end pivot of each cylinder on the frame on the respective ledge 170, and an end pivoting link on the throw of lever 172.The fulcrum of described throw of lever is contained on the adjustable connecting rod 174, and when device work, this bar 174 is fixed to suitable position.Each lever arm 172 preferably has a crouch piece, has a slotted hole 180 in the end of each elongate articles 178, it and an extension rod 162 mating reactions, and this bar connects with reciprocal one of supporting member 152.Provide the adjusting retainer 182 that is fit to a thread rod or other to determine each hot plywood 54 position the most inwards under closure state.

When work stops and starting and hot plywood 54 when being shown in an open position, air knife 184 and 186(are only shown in Figure 9 up and down) between hot plywood and film 20, produce the air-flow of lower temperature.This air knife is bearing in corresponding going up on the lower support leg 188,190, and to the support body 148 of hot plywood device, this air knife is connected with workshop air or other suitable extraneous source of the gas its leg with bolt.Like this, when this air knife and coiled strip are out of service, open hot plywood and match and prevented the overheated of coiled strip and clamping band.

Obviously as mentioned above, the invention provides the method and apparatus that a kind of improved moulding, filling and sealing can repeat enclose dress thing.

The invention is not restricted to the embodiments described or arbitrary independent embodiment, but limit by following claim.

Claims

1, a kind of by shaping-filling-sealing arrangement with pack into the method for Reclosable packaging bag of food, comprising:

Send into the continuous coiled strip of packing;

The continuous arrowband of a pair of clamping material is connected on the described packing coiled strip that is on the connection station, and the described band of clamping material is the portrait orientation configuration with respect to the coiled strip at described connection station;

Described packing are vertically bent at described bending station, so that be connected with described clamping material band;

Described clamping material band is intermeshed;

Make the part of described coiled strip keep smooth substantially, be horizontal orientation substantially, to accept described food at the filling station;

Described food is placed on the described part of the described coiled strip that is in described filling station place;

Scroll up the described part of described coiled strip around described food, and make the described part opposite edges of coiled strip converge;

Described opposite edges part is sealed to each other to form a vertical wing sealing;

Be close to described food front end place with described coiled strip transverse sealing;

Transverse cuts is at the coiled strip of contiguous described food front end;

Transverse cuts is at the coiled strip of contiguous described food rear end.

2, the method for claim 1 is characterized in that comprising the described coiled strip that is tilted between described connection station and the described bending station, and the inclination of described coiled strip has changed its transverse width.

3, method as claimed in claim 2 is characterized in that the degree of dip of described coiled strip is being adjacent to described clamping material band place maximum.

4, the method for claim 1 is characterized in that described packing coiled strip comprises the branch polymeric material, and described material comprises the skin that comprises ethylene vinyl acetate copolymer.

5, method as claimed in claim 4, it is characterized in that the step that described clamping material is connected on the described packing is comprised: heat the presumptive area on the described packing coiled strip, make the coating fusing on it, be subjected to described coating to make described clamping material adhesive effectively to described packing.

6, the method for claim 1 is characterized in that it is that precoating hot melt adhesive by on the described clamping material works that wherein said clamping material is connected on the described packing.

7, the method for claim 1, the step that wherein said clamping material is connected on the described packing continuously comprises: melt the precoating ethylene vinyl acetate coating on described packing and the described clamping material, and described packing and clamping material both sides are exerted pressure simultaneously, described clamping material is pressed onto on the described packing.

8, a kind ofly be attached to the clamping material on the packing and the device of moulding, filling and the packaging bag of sealing Reclosable, comprise:

-support body;

-packing coiled strip;

-device that described packing coiled strip is sent into;

-clamping material with continuous length comprises the first and second intermeshing bands;

-described clamping material is connected to device on the described packing connecting station;

-in described packing coiled strip, realize the vertically device of bending, the band that intermeshes of the described first and second clamping materials is bonded together, and described clamping material band is put into vertical bending part of described packing;

-make described first and second to intermesh and be with intermeshing device;

-keep the part of coiled strip to be smooth substantially and horizontal layout to accept the device of product;

-described product is put into device on the described part of described coiled strip;

-center on the device that described product scrolls up first coiled strip, its opposite edges are converged;

-described opposite edges are sealed to each other to form a wing leak free device;

-with the device of the described first coiled strip transverse seal,, a bag is separated from another bag with the transverse sealing that the moulding bag is provided and the device of the described packing coiled strip of transverse cuts.

9, device as claimed in claim 8 is characterized in that also comprising the device of controlling described coiled strip fold.

10, device as claimed in claim 9 is characterized in that the device of its described control fold comprises roller.

11, device as claimed in claim 10 is characterized in that wherein said roller has the diameter that does not wait.

12, device as claimed in claim 10 is characterized in that wherein said roller is a bevelled, and its axis is not orthogonal to the direction that described coiled strip is sent into.

13, device as claimed in claim 8, it is characterized in that the wherein said device that the clamping material is connected on the described packing comprises the relative device partly with described packing coiled strip of the flange portion that heats described clamping material, the device of exerting pressure is to be pressed onto described flange portion on the described relative part of described coiled strip.

14, device as claimed in claim 13, it is characterized in that wherein said heating arrangement comprises a pair of elongated heater element, this element is parallel with described coiled strip service direction at described connection station, the length of described elongated heater element is at least 12 inches, and when work, one little gap is arranged, heat the described flange portion of described clamping material and the appropriate section of described coiled strip effectively by the thermal radiation conduction apart from described coiled strip and clamping material.

15, device as claimed in claim 14, when the feeding that it is characterized in that also being included in described coiled strip stops, the device that described heater element is removed from described clamping material and coiled strip.

16, as the device of claim 15, it is characterized in that also comprising a pair of air knife, when described coiled strip feeding stopped, described air knife produced air-flow above described clamping material and coiled strip.

17,, it is characterized in that wherein said device of exerting pressure comprises first and second rollers, their the other side that offsets with respect to each as the device of claim 13.